On most Android devices, you can find the Battery Optimization in the Settings of your phone.
- Drag down from the top of your screen to open the menu and then click the gear icon in the upper right corner.
- Click the magnifying glass to search for Timeero.
- Select Timeero from the Apps section.
- Click Battery under "Usage".
- Confirm that Unrestricted is selected.
To double check that you've set it correctly, you can go into the Tracker Checklist on the Timeero app and it should have a green checkmark next to it to indicate that it is complete.